<template>
  <div class="login_container">
    <div class="login_box">
      <!--头像区域 -->
      <div class="avatar_box">
          <img src="../assets/logo.png" alt="">
      </div>
      <!--登录表单区域  -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
        <!-- 用户名 -->
         <el-form-item prop="username">
            <el-input v-model="loginForm.username" prefix-icon="el-icon-user"></el-input>
         </el-form-item>
         <!-- 密码 -->
         <el-form-item prop="password">
            <el-input v-model="loginForm.password" prefix-icon="el-icon-lock" type="password"></el-input>
         </el-form-item>
         <!-- 按钮区域 -->
         <el-form-item class="btns">
            <el-button type="primary" @click="login" >登录</el-button>
            <el-button type="info" @click="resetLoginFrom" >重置</el-button>
         </el-form-item>
      </el-form>   
    </div>
  </div>
</template>

<script>

export default {
    data(){
      return{
        // 这是登录页面的表单对象
        loginForm: {
          username:'admin',
          password:'123456'
        },
        //这是表单验证规则对象
        loginFormRules: {
          // 验证用户名是否合法
            username: [
              { required: true, message:"请输入登录名称",trigger: "blur" },
              { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
            ],
          //验证密码是否合法  
            password: [
              { required: true, message:"请输入登录密码",trigger: "blur" },
               { min: 6, max: 8, message: '长度在 6 到 8 个字符', trigger: 'blur' }
            ]
        }
      }
    },
    methods: {
      //点击重置按钮，重置登录表单
      resetLoginFrom() {
          // console.log(this);
          //表单输入框重置
          this.$refs.loginFormRef.resetFields();
      },
      login() {
        this.$refs.loginFormRef.validate(async valid => {
          if(!valid) return;
          const {data:res} = await this.$http.post('login',this.loginForm);
          if (res.meta.status != 200) return  this.$message.error("登录失败");
          this.$message.success("登录成功");
          window.sessionStorage.setItem("token",res.data.token);
          this.$router.push('/home')
        });
      }
    }
}

</script>

<style lang="less" scoped>
  .login_container {
    background-color: #2b4b6b;
    height: 100%;
  }
  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position:absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
  }

  .avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
.btns{
   display: flex; //弹性模型
   justify-content: flex-end; //水平 居右对齐
}

.login_form{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>
